App bar action pinning

[rhyskoedijk]

• Resolve CodeQL findings
• When searching, prioritise results that match the type being described (e.g. "halloween store" will show "store" results first)
• App bar notifications "last viewed" timestamp is now stored in local storage instead of as a cookie
• Add support for pinning "actions" to the app bar; supported actions are:
  • Items
  • Item collections
  • Item types
  • Item lists
  • Item stores